Validate charset names for all charset options.

Validation is either done against mutt's table of IANA assigned names or local iconv
implementation (based on the assumption that iconv_open(charset,charset) fails if charset
is unknown to the implementation). Closes #1668.

1 files changed, 6 insertions, 0 deletions

diff --git a/charset.h b/charset.h
index ab5f062b..bb308868 100644
--- a/charset.h
+++ b/charset.h
@@ -56,4 +56,10 @@ char *mutt_get_default_charset ();
  */
 #define M_ICONV_HOOK_FROM 1	/* apply charset-hooks to fromcode */
 
+/* Check if given character set is valid (either officially assigned or
+ * known to local iconv implementation). If strict is non-zero, check
+ * against iconv only. Returns 0 if known and negative otherwise.
+ */
+int mutt_check_charset (const char *s, int strict);
+
 #endif /* _CHARSET_H */